螺旋输送器中颗粒混合过程的模拟

戚华彪1 徐骥1 宋文立1 葛蔚1,2

(1.中国科学院过程工程研究所多相复杂系统国家重点实验室, 北京 100190)
(2.中国科学院大学化学化工学院, 北京 100049)

【摘要】采用离散单元法 (discrete element method, DEM) 模拟了工业尺度螺旋输送器中两种不同密度与粒径的颗粒的流动状态与混合过程。采用Lacey混合指标的定量分析表明, 该输送器的混合性能强烈地依赖于操作条件和结构尺寸, 转速和物料的添加速率对混合效果影响最大, 其次是混合段螺距和物料粒径。根据工业生产的具体要求, 可参考上述发现合理地选择技术参数、提高混合效率、降低能耗。

【关键词】 颗粒; 离散单元法; 螺旋输送器; 混合机理; 大规模模拟;

【DOI】

【基金资助】 中国科学院战略性先导科技专项 (XDA07080000) supported by the“Strategic Priority Research Program”of the Chinese Academy of Sciences (XDA07080000) 中国科学院前沿科学重点研究项目 (QYZDJ-SSW-JSC029) the Key Research Program of Frontier Science, CAS (QYZDJ-SSW-JSC029) 中国科学院科技创新交叉与合作团队 the CAS Interdisciplinary Innovation Team 国家自然科学基金项目 (91434201) the National Natural Science Foundation of China (91434201)

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This Article

ISSN:0438-1157

CN: 11-1946/TQ

Vol 69, No. 01, Pages 371-380

January 2018

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Article Outline

摘要

  • 引言
  • 1 模拟方法
  • 2 模拟条件
  • 3 测量方法
  • 3 结果分析
  • 4 结论
  • 符号说明
  • 参考文献